bug(schematics): Cannot find module '@angular-devkit/core'

[meDavid]

Bug Report or Feature Request (mark with an x)

- [X ] bug report -> please search issues before submitting
- [ ] feature request

Area

- [ ] devkit
- [X ] schematics

Versions

node 6.9.1
npm 5.4.2
Windows 10

Repro steps

If you globally install @angular-devkit/schematics and try to create a new schematic using
schematics @schematics/schematics:schematic --name=SomeSchematicName you will get the following error:

The log given by the failure

Error: Cannot find module '@angular-devkit/core'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (C:\......\node_modules\@schematics\schematics\schematic\factory.js:10:16)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)

Desired functionality

No errors and a generated new schematics blueprint

Mention any other details that might be useful

the @schematics/schematics:schematic factory uses a dependency on @angular-devkit/core, but this dependency is not in the package.json

[theoomoregbee]

Yea same issue here, after uninstalling angular-cli then after installing the latest angular-cli,
ng help boom this

[theoomoregbee]

npm install -g @angular-devkit/core fixed it anyway
related to this angular/angular-cli#9190

[rathodmitesh916]

@Theo4u
So should I just add it to my package.json if angular-cli uses it internally? Because we don't use this module in our code base.

[theoomoregbee]

@jainmitesh09 Oh can't really say, since it's in the pkgjson .
https://github.com/angular/angular-cli/blob/9c871b003a8d91051e9d7affc63206aef4b71e20/package.json#L45

But i added it to mine to stop the error when running local commands like ng serve --> npm install @angular-devkit/core --save-dev

[szkrd]

Same here. As a quick fix npm i -D @angular-devkit/core in the project folder fixed it for me.

[germs12]

I rolled back to angular-cli 1.6.3

[mmercure]

It seems that some dependencies became peerDependencies. :(

But restarting from scratch now works because of newer version just deployed

[ankemp]

Taking @germs12 advice, I rolled back to 1.6.3. But then I re-installed 1.6.4 and everything seems to be working again.

[merobal]

I don't know what happened, I got the same error during npm install ~1 hour ago, but now everything worked fine again (without any change from my side meantime).

[filipesilva]

There was indeed a bad release about 1h ago but we've since rolled back and republished the previous version while we work on a real fix.

[hansl]

See angular/angular-cli#9276